The Garrett GTW3884JB is a 67mm journal bearing turbocharger engineered for enthusiasts who demand serious top-end power without sacrificing a broad, usable powerband. Built as Garrett’s performance-focused answer to the popular 6766 turbo size, this GTW Series unit delivers exceptional flow capacity at a price point that makes big-turbo builds more attainable. It’s the right choice for builders chasing high horsepower numbers on a proven, journal bearing platform.

Specifications

• Compressor Wheel Inducer: 67.3mm
• Compressor Wheel Exducer: 84.4mm
• Compressor Wheel Trim: 64
• Turbine Wheel Inducer: 74.2mm
• Turbine Wheel Exducer: 64.6mm
• Turbine Wheel Trim: 76
• A/R Ratio: .82
• Turbine Inlet: T3 Undivided Inlet
• Turbine Outlet: Welded GT 3″ V-Band Outlet
• Compressor Housing: T04S Frame with 4″ inlet, 2.5″ outlet, and built-in & machined anti-surge
• Bearing Type: Journal Bearing
• HP Potential: 950HP potential flow
• Garrett P/N: GTW3884JB
• Also Known As: GTW6765JB

Performance & Application

The GTW3884JB is built for high-output builds targeting serious horsepower, offering 950HP potential flow for enthusiasts pushing well past stock turbo limits. Its journal bearing design and 64 trim compressor paired with a 76 trim turbine wheel deliver the flow characteristics needed for aggressive, high-boost applications. The .82 A/R turbine housing with T3 undivided inlet and welded GT 3″ V-band outlet is tailored for builders who want strong top-end power in a bolt-on-friendly package. As part of the GTW Series, it represents Garrett’s performance-engineered alternative to the widely used 6766 turbo size, giving builders a competitively priced path to big power.

Frequently Asked Questions

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